EGG BOUND EMERGENCY

Please someone help me! I think my chicken is egg bound she looks like it! I gave her a soapy bath and put her in a dark place so she can lay her egg! It didn't work! I'm the shavings some spots are yellow/green she's maybe 3-4 years old she's a leghorn I don't want to loose her someone please help I'm desperate. Is it possible she isn't egg bound?